Basic Science General Knowledge Questions for Competitive Exams
Which of the following is the site of photosynthesis and is also involved in the foliage?
(A) Haritlavak
(B) Rasdhani
(C) Cytoplasm
(D) Nucleus
Correct Answer : A
A drop of water spreads on a glass plate to form a thin layer whereas the drop of mercury remains spherical because
(A) Mercury is a metal
(B) The density of mercury is greater than the density of water
(C) The affinity of mercury with glass is greater than its strength
(D) The affinity of water with glass is greater than its strength
Correct Answer : C
Helium is added to the oxygen supply of deep-sea divers because:
(A) It is less toxic than nitrogen
(B) It is lighter than nitrogen
(C) It mixes quickly with oxygen
(D) It is less soluble in blood than nitrogen at high pressure
Correct Answer : D
Which is the most serious air pollutant that endangers health?
(A) Sulfur dioxide
(B) Carbon monoxide
(C) Ozone
(D) Nitrogen oxide
Correct Answer : A
At the boiling point of liquids ______
(A) Temperature rises
(B) Atmospheric pressure increases
(C) Temperature remains constant
(D) Vapor pressure decreases
Correct Answer : C
Apart from protozoa, which enzyme is present in all members of the animal kingdom?
(A) Insulin
(B) Pepsin
(C) Renin
(D) Amiles
Correct Answer : D
Why does the Earth have its own atmosphere?
(A) Air
(B) Clouds
(C) Gravitational force
(D) Earth's rotation
Correct Answer : C
Which one of the following is not a natural greenhouse gas?
(A) Carbon dioxide
(B) Nitrogen
(C) Water vapor
(D) Methane
Correct Answer : B
Who among the following discovered blood circulation?
(A) William Harvey
(B) Florence Ren Sabin
(C) Ernest Heinrich Weber
(D) Von Leeuwenhoek
Correct Answer : A
Which of the following hormones is believed to help in relieving stress?
(A) Serotonin
(B) Testosterone
(C) Calcitonin
(D) Melatonin
Correct Answer : A
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Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
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